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andrew11 [14]
3 years ago
6

The slope on a distance-time graph shows a ball moving from 20 m to 40 m in 1 s and from 40 m to 80 m in the next second

Physics
1 answer:
eduard3 years ago
8 0

The ball is accelerating

Explanation:

On a distance-time graph, the slope of the graph represents the speed of the object represented.

Let's therefore calculate the slope (so, the speed of the ball) in the two intervals given.

In the first second, we have:

\Delta y = 40 - 20 = 20 m\\\Delta x = 1 s

So the average speed is

v_1 = \frac{\Delta y}{\Delta x}=\frac{20}{1}=20 m/s

In the next second, we have:

\Delta y = 80 - 40 = 40 m\\\Delta x = 1 s

So the average speed is

v_2 = \frac{\Delta y}{\Delta x}=\frac{40}{1}=40 m/s

We notice that the speed of the ball has increased from 20 m/s in the first second to 40 m/s in the next second: this means that the speed of the ball is increasing, and therefore, the ball is accelerating.

Learn more about acceleration:

brainly.com/question/9527152

brainly.com/question/11181826

brainly.com/question/2506873

brainly.com/question/2562700

#LearnwithBrainly

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Answer:

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Explanation:

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Something similar happens if the core reduces its radius. This can happen at the end of the star's lifetime, shortly before it becomes a red giant. Once the hydrogen is depleted, the core will start to shrink because the force of gravity, and as it gets smaller, gets more compressed, and its temperature increases. The outer layers of remaining Hydrogen that were outside the core now begin to heat up, and as the core continues to shrink, the star gets hot enough to begin the fusion process again, and the fusion rate can even be higher than it was during the first phase of the star, as the star becomes a Red Giant.

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